Annealing of cast steel and mold parts is one of the widely used heat treatment processes, which usually heats the mold parts to 20-30°C above the critical temperature, then holds them for a certain time and then cools them slowly to obtain a process close to the equilibrium structure. The purpose of annealing cast steel and mold parts is to: ① reduce the hardness of the mold to a minimum to prepare the conditions for heating and cold pressing; ② eliminate internal stresses in the mold; ③ homogenization of steel composition and steel quality. Texturing, final preparation of fabric for heat treatment

Annealing of die steel and die parts is divided into full annealing, isothermal annealing, spheroidal annealing, diffusion annealing, softening annealing and low temperature annealing.